User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.3a5pre) Gecko/20100524 Minefield/3.7a5pre Firefox/3.6.3 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.3a5pre) Gecko/20100524 Minefield/3.7a5pre Firefox/3.6.3 A very large image with over 32000 pixel height does only show the broken image icon. Reference: http://forums.mozillazine.org/viewtopic.php?f=38&t=1905989&start=0 Reproducible: Always Steps to Reproduce: View given page or attachment Actual Results: broken image icon appears Expected Results: Either show the image partially (like Firefox 3.6) or complete Regression window: Works (show something as same as Firefox3.6.x): http://hg.mozilla.org/mozilla-central/rev/2968d19b0165 Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100426 Minefield/3.7a5pre ID:20100426040533 Broken Image Icon only: http://hg.mozilla.org/mozilla-central/rev/f236632a9747 Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100426 Minefield/3.7a5pre ID:20100426084628 Push log: http://hg.mozilla.org/mozilla-central/p ... 36632a9747 Candidate regression bug: Bug 542605 - Update cairo to a newer version

For reference this is the image of the given URL.

Range is http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=2968d19b0165&tochange=f236632a9747

Recent similar sounding bugs: bug 566273 and bug 566453

#566453 seems to be a dupe (it is the first report). The regression range matches. The other one is the known limitation bug which does not apply here.

I've just experienced this bug on Mac with a 1264×35204 image (placeholder displayed instead of the image, while the same PNG is working fine on Firefox 3.6.8), other people had the same problem with Firefox 4.0b2 on Windows, so changing platform to All. Current build: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b3pre) Gecko/20100802 Minefield/4.0b3pre

This does indeed look like a duplicate of bug 566453.

FWIW, the PNG fails to display in Chrome with hwaccel on when zoomed (displays when adjusted to window size), and even fails to display correctly (refresh/invalidation issues) in Firefox 3.6.14 near the bottom (past the 32k limit?) ... It works in IE8 and IE9.

Jeff, this regressed after a Cairo update (see comment 2).

Cannot reproduce with newest nightly, 53.0b9 on Windows 10(x64), User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0 Build ID: 20170407030233 User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170403072723

Confirmed; the attached sample image works here as well. Build identifier: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0